Well, I think my PWC B-Unit has either blown a speaker or been fried.
It no longer makes Legacy Railsounds and comparing it's settings with my Southern B-Unit of the same brand/model which does work, they are configured the same.
Is there a visible way to know if a speaker is blown? Like a tear in the speaker paper?
The only sound it makes at any volume is a very low volume and subtle light, thin static that is barely noticed.